Siemens SIMATIC S7-1500 System Manual page 341

Note
F-System SIMATIC Safety
Setting breakpoints in the standard user program results in errors in the
security program:
• Sequence of F cycle time monitoring
• Error in communication with the fail-safe I/O
• Error during safety-oriented CPU-CPU communication
• internal CPU error
If you still wish to use breakpoints for testing, you must deactivate
the safety mode beforehand. This will result in the following errors:
• Error in communication with the fail-safe I/O
• Error during safety-oriented CPU-CPU communication
Testing with watch tables
The following functions are available in the watch table:
• Monitoring of tags
With watch tables, you monitor the current values of individual tags in a user program or a
CPU on the PG/PC and Web server. Please note the following requirement for displaying
the tag values on the Web server: You must specify a symbolic name for the tag in the
"Name" column of the watch table.
You monitor the following operand areas:
– Inputs and outputs (process image) and bit memory
– Contents of data blocks
– Peripheral inputs and peripheral outputs
– Timers and counters
• Modifying tags
You use this function to assign fixed values to individual tags in a user program or a CPU
on the PG/PC. Modifying is also possible with Test with program status.
The following operand areas are modifiable:
– Inputs and outputs (process image) and bit memory
– Contents of data blocks
– Peripheral inputs and peripheral outputs (for example, %I0.0:P, %Q0.0:P)
– Timers and counters
• "Enable peripheral outputs" and "Modify now"
These two functions enable you to assign fixed values to individual peripheral outputs of a
CPU in the STOP mode. You can also use them to check your wiring.
SIMATIC Drive Controller
System Manual, 11/2023, A5E46600094-AD
Test and service functions
16.1 Test functions
339